• English
    • Norsk
  • English 
    • English
    • Norsk
  • Administration
View Item 
  •   Home
  • Øvrige samlinger
  • Høstingsarkiver
  • CRIStin høstingsarkiv
  • View Item
  •   Home
  • Øvrige samlinger
  • Høstingsarkiver
  • CRIStin høstingsarkiv
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Isovalent-substitution effect on the Verwey-type transition in the A-site-ordered double perovskite (Ba,Sr)RFe2O5

Nakamura, J; Karppinen, M; Karen, Pavel; Linden, J; Yamauchi, H
Journal article; PublishedVersion; Peer reviewed
View/Open
2004+NakamuraPRB.pdf (237.1Kb)
Year
2004
Permanent link
http://urn.nb.no/URN:NBN:no-62202

CRIStin
419043

Metadata
Show metadata
Appears in the following Collection
  • Kjemisk institutt [830]
  • CRIStin høstingsarkiv [15189]
Original version
Physical Review B. Condensed Matter and Materials Physics. 2004, 70, DOI: http://dx.doi.org/10.1103/PhysRevB.70.144104
Abstract
Two types of chemical-pressure effects on the Verwey-type transition in Ba Sm Fe 2 O 5 are studied, viz., ionic-size contractions at the Ba and Sm sites. Whereas the replacement of Sm by the smaller Eu and Gd atoms increases the transition temperature TV from 232 K to 264 K , the Sr-for-Ba substitution decreases it from 232 K to 180 K for x=0.15 in (Ba 1 − x Sr x ) Sm Fe 2 O 5 . Of various structural parameters determined by synchrotron x-ray diffraction above TV, the magnitude of the orthorhombic distortion (=b− a ) is found to correlate with TV in a manner that unifies both substitution schemes. It is suggested that when an increase in b− a above TV is achieved by means of the structural substitution, it makes it easier for the dxz Fe 2 + orbital ordering to occur below TV.

© 2004 American Physical Society
 
Responsible for this website 
University of Oslo Library


Contact Us 
duo-hjelp@ub.uio.no


Privacy policy
 

 

For students / employeesSubmit master thesisAccess to restricted material

Browse

All of DUOCommunities & CollectionsBy Issue DateAuthorsTitlesThis CollectionBy Issue DateAuthorsTitles

For library staff

Login
RSS Feeds
 
Responsible for this website 
University of Oslo Library


Contact Us 
duo-hjelp@ub.uio.no


Privacy policy